EP 0632009 B1 19970730 - Process for the recuperation of fluorinated carboxylic acids
Title (en)
Process for the recuperation of fluorinated carboxylic acids
Title (de)
Verfahren zur Rückgewinnung von fluorierten Carbonsäuren
Title (fr)
Procédé pour la récupération d'acide carboxyliques fluorés
Publication
Application
Priority
- DE 4318258 A 19930602
- DE 4402694 A 19940129
Abstract (en)
[origin: EP0632009A1] Fluorinated carboxylic acids can be recovered from materials which contain them by if necessary liberating the carboxylic acids with sufficiently strong acids, esterifying the liberated acids and distilling off the esters. Advantageously, the esters can be hydrolysed immediately with aqueous ammonia solution to give the corresponding ammonium salts.
IPC 1-7
C07C 53/50; C07C 51/493; C08F 14/26; C08F 114/26; C08F 214/26
IPC 8 full level
C07C 67/54 (2006.01); C07C 51/02 (2006.01); C07C 51/09 (2006.01); C07C 51/41 (2006.01); C07C 51/48 (2006.01); C07C 51/493 (2006.01); C07C 53/21 (2006.01); C07C 53/50 (2006.01); C07C 67/08 (2006.01); C07C 67/60 (2006.01); C07C 69/63 (2006.01); C08F 14/18 (2006.01); C08F 14/26 (2006.01); C08F 114/26 (2006.01); C08F 214/26 (2006.01)
CPC (source: EP US)
C07C 51/02 (2013.01 - EP US); C07C 51/09 (2013.01 - EP US); C07C 51/493 (2013.01 - EP US); C07C 67/08 (2013.01 - EP US); C08F 14/18 (2013.01 - EP US)
C-Set (source: EP US)
Designated contracting state (EPC)
BE DE GB IT NL
DOCDB simple family (publication)
EP 0632009 A1 19950104; EP 0632009 B1 19970730; DE 4402694 A1 19950803; DE 59403519 D1 19970904; JP 4050338 B2 20080220; JP H0753465 A 19950228; PL 177819 B1 20000131; PL 303680 A1 19941212; RU 2131408 C1 19990610; RU 94019422 A 19960420; US 5442097 A 19950815; US 5591877 A 19970107
DOCDB simple family (application)
EP 94108359 A 19940531; DE 4402694 A 19940129; DE 59403519 T 19940531; JP 12039694 A 19940601; PL 30368094 A 19940601; RU 94019422 A 19940601; US 25175294 A 19940531; US 43316495 A 19950503